This book is about that variation. And I hope that readers will find it encouraging rather than depressing. Writing it, I often thought of a line from a letter Kafka sent to his beloved Felice Bauer in 1912. Frustrated by his cramped living situation and his deadening day job, he complained, “time is short, my strength is limited, the office is a horror, the apartment is noisy, and if a pleasant, straightforward life is not possible then one must try to wriggle through by subtle maneuvers.” Poor Kafka! But then who among us can expect to live a pleasant, straightforward life? For most of us,
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